CAJ | 학술논문

通过田间系统调查、雌蛾卵巢系统解剖、轨迹分析、天气学背景分析及历史虫情分析,阐释了广西早稻上稻纵卷叶螟前期虫源和种群性质,发现2007年广西南宁市稻纵卷叶螟主迁入峰的主要虫源地为越南北部、老挝或泰国的中北部地区.通过比较1970-1980年和2000年以来两个不同时段中稻纵卷叶螟前期迁入(4、5月份)和秋季回迁(9、10月份)高峰期和高峰日的发生时间和发生量,分析1981-2002年与2003年以来两个时段之间的雨量、雨日与前期迁入量之间的关系, 发现2003年以来境外虫源前期迁入量倍增及秋季回迁提早(从9月中旬提前到9月初)是造成南宁稻纵卷叶螟连年大发生到特大发生的主要原因,而早期迁入与秋季回迁在时间和发生虫量上并无必然的联系.
통과전간계통조사、자아란소계통해부、궤적분석、천기학배경분석급역사충정분석,천석료엄서조도상도종권협명전기충원화충군성질,발현2007년엄서남저시도종권협명주천입봉적주요충원지위월남북부、로과혹태국적중북부지구.통과비교1970-1980년화2000년이래량개불동시단중도종권협명전기천입(4、5월빈)화추계회천(9、10월빈)고봉기화고봉일적발생시간화발생량,분석1981-2002년여2003년이래량개시단지간적우량、우일여전기천입량지간적관계, 발현2003년이래경외충원전기천입량배증급추계회천제조(종9월중순제전도9월초)시조성남저도종권협명련년대발생도특대발생적주요원인,이조기천입여추계회천재시간화발생충량상병무필연적련계.
The population feature and source areas of the rice leaffolder, Cnaphalocrocis medinalis (Guenée) on early-season rice in Nanning, Guangxi Zhuang Autonomous Region, China were studied through systematic field survey, dissection of female ovarian, trajectory analysis, synoptic analysis and historical data analysis. The results indicated that the possible source areas of the major immigrant populations of C. medinalis in Nanning, China in 2007 were the northern parts of Vietnam, and the northern and central parts of the Laos and Thailand. The amount and date of the spring immigration in April-May and autumn return migration and their relationships with rainfall and rainy days between 1970-1980 and the recent years after 2000 were compared. It was found that the enormous increase of the spring immigrants of C. medinalis and earlier appearance of the autumn return immigration were the main causes for the consecutive outbreaks and serious damages after 2003. There were no relationships between the spring immigration and the autumn return migration, neither on its amount nor the date.